What are the types of water treatment chemicals?

Water treatment agents include the following three categories of products:
1. General chemicals: originally refers to inorganic chemical products used for water treatment, such as aluminum sulfate, sulfuric acid, sodium hydroxide, sulfuric acid, etc.
2. Special chemicals for water treatment: ion exchange resin and organic water treatment chemicals including activated carbon, inorganic polyaluminium chloride, organic flocculant, lime, alum, etc. (such as polyacrylamide, potassium acid acid, polyamine and polyquaternary ammonium salt), etc.;
3. Formulated chemicals: including corrosion inhibitors, scale inhibitors, bactericides and combustion aids, etc.